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English rat
← German zerreißen (cognate)
← English traitor (link)
← English stool pigeon (link)
← English mouse (link)
← English rodent (link)
← English tell on (link)
← English write (mention)
← English rit (mention)
← English C-rat (link)
← Middle English ratte (inherited)
← Middle English rat (mention)
← Middle English rotte (mention)
← Middle English ratten (inherited)
← West Frisian rôt (cognate)
← Proto-Germanic *rattaz (inherited)
← Proto-Germanic *rattō (mention)
← Proto-Germanic *rattaz (mention)
← Middle High German rate (cognate)
← Middle High German ratte (mention)
← Middle High German ratze (mention)
← Middle High German ratzen (cognate)
← Middle Low German ratte (cognate)
← Middle Low German radde (mention)
← Proto-Indo-European *reh₁d- (root)
← Proto-Indo-European *reh₁d- (derived)
← Proto-Indo-European *reh₁d- (derived)
← Dutch rat (cognate)

→ English muskrat (mention)
→ English muskrat (mention)
→ English ratshit (compound)
→ English ratline (mention)
→ English ratter (suffix)
→ English razor (mention)
→ English hood rat (compound)
→ English packrat (compound)
→ English ratty (suffix)
→ English rattery (suffix)
→ English ratlike (suffix)
→ English ratbag (compound)
→ English rattrap (compound)
→ English torat (prefix)
→ English rathole (compound)
→ English deratization (confix)
→ English ratsbane (compound)
→ English ritten (blend)
→ English ratfink (compound)
→ English rat race (compound)
→ English moonrat (compound)
→ English rugrat (compound)
→ English derat (prefix)
→ English hoodrat (compound)
→ English wererat (prefix)
→ English ratcatcher (compound)
→ English rattail (compound)
→ English rattish (suffix)
→ English ratfish (compound)
→ English -a- (mention)
→ English ratproof (suffix)
→ English ratless (suffix)
→ English antirat (prefix)
→ English ratskin (compound)
→ English raticide (suffix)
→ English ratling (suffix)
→ English woodrat (compound)
→ English whitret (compound)
→ English bograt (compound)
→ English ratface (compound)
→ Moroccan Arabic طوبة (link)
→ Cebuano r-a-t (mention)
→ German Ratte (mention)
→ German reißen (cognate)
→ Middle English bakke (mention)
→ Luxembourgish Rat (cognate)
→ Norwegian Nynorsk rotte (link)
→ Pennsylvania German Ratt (cognate)
→ Portuguese rato (link)
→ Portuguese calhorda (link)
→ Sanskrit रदति (cognate)
→ Sranan Tongo alata (derived(srn/srm))
→ Sranan Tongo alata (derived)
→ Torres Strait Creole rat (inherited)
→ Volapük rat (borrowed)